1 files changed, 37 insertions, 0 deletions
diff --git a/guile/pdp_guile.scm b/guile/pdp_guile.scm
new file mode 100644
index 0000000..8ca17f2
--- /dev/null
+++ b/guile/pdp_guile.scm
@@ -0,0 +1,37 @@
+; pdp_guile.scm - a simple event dispatcher to be used with pdp_guile
+
+; some global variables
+(define input-hash (make-hash-table 31))
+(define input-loop-flag #t)
+(define input-loop-interval-ms 10)
+
+; add an input handler
+(define (add-input! tag handler)
+  (hashq-create-handle! input-hash tag handler))
+
+; the main input dispatcher loop
+(define (input-loop)
+  (while input-loop-flag
+	 (usleep (* input-loop-interval-ms 1000))
+	 (let nextmsg ((msg (in)))
+	   (if msg
+	       (begin
+		 (let ((fn (hashq-ref input-hash (car msg))))
+		   (if fn (fn (cadr msg))))
+		 (nextmsg (in)))))))
+
+(define (start)
+  (set! input-loop-flag #t)
+  (out 'start 'bang)
+  (input-loop))
+
+
+; the control message handler
+(add-input! 'control
+	    (lambda (thing)
+	      (case thing
+		('stop (set! input-loop-flag #f))    ; stop the input loop and return to interpreter
+		('gc (gc)))))                        ; call the garbage collector
+
+
+